I think that they only claim that it works on American Dog Ticks to cover themselves from liability associated with Lyme disease. My family just got back from a heavily wooded area where ticks are a problem. Our dog picked up several ticks that I discovered while giving him a flea/tick bath two days later. The ticks were still attached but already dead. He had both Deer and Lone Star ticks on him.
– MichaelMay 30 '19 at 14:24

1 Answer
1

Revolution (Selamectin) controls tick infestations only due to the American Dog Tick (Dermacentor variabilis), a tick commonly found on dogs. There are other common species of ticks that are not killed or controlled by REVOLUTION. Your veterinarian can recommend appropriate products to control or kill ticks common to your area. Source

But...

It’s not effective against the deer tick that causes Lyme disease. source